层间隔震底层框架砌体房屋动力计算方法

底层框剪结构多层砖房在城市建设中应用广泛，这种房屋的特点是由2种承重和抗侧力体系构成的，但是这类房屋的抗震性能较差．为此，提出把隔震橡胶垫放置在上部砌体与底层框架结构之间的隔震措施，它依靠隔震层较大的变形和耗能能力，大大削弱了地震对建筑结构的影响．由于上部砖房的刚度比隔震垫与底层框架的刚度大得多，因此可以将隔震房屋模拟成具有2个自由度的系统．并分析了此类房屋的动力特性，与隔震振型的参与系数相比，非隔震振型的参与系数非常小，隔震振型控制了系统的反应，得到了用来求解此类房屋动力计算的实用方法．为建立实用设计方法、推广层间隔震结构的应用提供了有效途径．

Practical Method for Dynamical Analysis to the Interlayer Seismic Isolation Masonry Building with Frame Structure in the First Storey

Masonry buildings with R/C frame- shear wall in the bottom storey have been widely used in city construction, which include two kinds of lateral force resistant system. However, the seismic behavior of the building is poor. Based on the characteristics that the rigidity of the upper masonry structure is much bigger than the rigidity of laminated rubber bearings and frame structure. It can be referred to as system having a two degree of freedom. The dynamic behavior of this building is analyzed, the isolated vibration mode controls the response of system. The authors give apractical method for dynamical analysis to masonry building with frame structure in the first storey with laminated rubber bearings between the first and second storey , which submits efficient path to found applicable design means and to generalize interlayer seismic isolation structure.